uint8 traj_id
float32 max
float32 min
uint8[] coef_x
uint8[] coef_y
uint8[] coef_z
# int16 drone_id
# int32 traj_id
# time start_time

# uint8 order
# float32[] coef_x
# float32[] coef_y
# float32[] coef_z
# float32[] duration
